Articles on Dark energy

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The Mayall 4-meter Telescope at the Kitt Peak National Observatory houses the DESI instrument. KPNO/NOIRLab/NSF/AURA/P. Marenfeld

Dark energy may have once been ‘springier’ than it is today − DESI cosmologists explain what their collaboration’s new measurement says about the universe’s history

Scientists have conflicting theories on why the universe is expanding at an accelerating rate. New measurements from a massive collaboration complicate these ideas.
DESI has made the largest 3D map of our universe. The Earth is at the central vertex, and every dot is a galaxy. DESI collaboration and KPNO/NOIRLab/NSF/AURA/R. Proctor

Dark energy may not be constant – this discovery could undermine our entire model of cosmological history

The universe’s expansion is accelerating, not decelerating. Our understanding of how the universe works may need an update.

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